package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrGroupRelationVo;
import com.atguigu.gulimall.product.vo.AttrRespVo;
import com.atguigu.gulimall.product.vo.AttrVo;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Autowired
    AttrAttrgroupRelationDao relationDao;

    @Autowired
    AttrGroupDao attrGroupDao;

    @Autowired
    CategoryDao categoryDao;

    @Autowired
    CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Transactional
    @Override
    public void saveAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();

        BeanUtils.copyProperties(attr,attrEntity);

        //1.保存基本数据
        this.save(attrEntity);

        if(attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()
            && attr.getAttrGroupId() != null) {
            //2.保存关联关系
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();

            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attrEntity.getAttrId());

            relationDao.insert(relationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
        QueryWrapper<AttrEntity> queryWrapper =
            new QueryWrapper<AttrEntity>().eq(
                "attr_type",
                "base".equalsIgnoreCase(type) ? ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode():ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());

        if(catelogId != 0) {
            queryWrapper.eq("catelog_Id", catelogId);
        }

        String key = (String) params.get("key");

        if(!StringUtils.isEmpty(key)) {
            queryWrapper.and((wrapper)->{
                wrapper.eq("attr_id", key).or().like("attr_name",key);
            });
        }

        IPage<AttrEntity> page = this.page(
            new Query<AttrEntity>().getPage(params),
            queryWrapper
        );

        PageUtils pageUtils = new PageUtils(page);

        List<AttrEntity> records = page.getRecords();

        List<Object> respVos = records.stream().map((attrEntity) -> {
            AttrRespVo attrRespVo = new AttrRespVo();

            BeanUtils.copyProperties(attrEntity, attrRespVo);

            if("base".equalsIgnoreCase(type)) {
                //设置分类和分组的名字
                AttrAttrgroupRelationEntity attId =
                    relationDao.selectOne(
                        new QueryWrapper<AttrAttrgroupRelationEntity>().
                            eq("attr_id", attrEntity.getAttrId()));

                if (attId != null && attId.getAttrGroupId() != null) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attId.getAttrGroupId());

                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }

            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());

            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }

            return attrRespVo;
        }).collect(Collectors.toList());

        pageUtils.setList(respVos);

        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrRespVo attrRespVo = new AttrRespVo();

        AttrEntity attrEntity = this.getById(attrId);

        BeanUtils.copyProperties(attrEntity,attrRespVo);

        AttrAttrgroupRelationEntity attrAttrgroupRelation = relationDao.selectOne(
            new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));


        if(attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            //设置分组信息
            if(attrAttrgroupRelation != null) {
                attrRespVo.setAttrGroupId(attrAttrgroupRelation.getAttrGroupId());

                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(
                    attrAttrgroupRelation.getAttrGroupId());

                if(attrGroupEntity != null) {
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }

        Long catelogId = attrEntity.getCatelogId();

        //设置
        attrRespVo.setCatelogPath(categoryService.findCatelogPath(catelogId));

        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);

        if(categoryEntity != null) {
            attrRespVo.setCatelogName(categoryEntity.getName());
        }

        return attrRespVo;
    }

    @Transactional
    @Override
    public void updateAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();

        BeanUtils.copyProperties(attr, attrEntity);

        this.updateById(attrEntity);

        if(attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            AttrAttrgroupRelationEntity relationEntity =
                new AttrAttrgroupRelationEntity();

            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attr.getAttrId());

            Integer count = relationDao.selectCount(
                new QueryWrapper<AttrAttrgroupRelationEntity>().eq(
                    "attr_id", attr.getAttrId()));

            if(count > 0) {
                //修改分组关联
                relationDao.update(
                    relationEntity,
                    new UpdateWrapper<AttrAttrgroupRelationEntity>().eq(
                        "attr_id", attr.getAttrId()));
            }else {
                relationDao.insert(relationEntity);
            }
        }


    }

    /**
     * 根据分组id查找所有关联的基本属性
     * @param attrgroupId
     * @return
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        List<AttrAttrgroupRelationEntity> entities = relationDao.selectList(
            new QueryWrapper<AttrAttrgroupRelationEntity>()
                .eq("attr_group_id", attrgroupId));

        List<Long> attrIds = entities.stream().map((attr) -> {
            return attr.getAttrId();
        }).collect(Collectors.toList());

        if(attrIds == null || attrIds.size() == 0) {
            return null;
        }


        List<AttrEntity> attrEntities = this.listByIds(attrIds);

        return attrEntities;
    }

    @Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {
//        relationDao.delete(
//            new QueryWrapper<AttrAttrgroupRelationEntity>()
//                .eq("attr_id",1).eq("attr_group_id",1));

        List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map((item) -> {
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity =
                new AttrAttrgroupRelationEntity();

            BeanUtils.copyProperties(item, attrAttrgroupRelationEntity);

            return attrAttrgroupRelationEntity;

        }).collect(Collectors.toList());

        relationDao.deleteBatchRelation(entities);
    }

    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
        //1.当前分组只能关联自己所在分类下的属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);

        Long catelogId = attrGroupEntity.getCatelogId();


        //2.当前分组只能关联分组没有引用的属性
        //2.1找到当前分类下的所有分组
        List<AttrGroupEntity> attrGroupEntityList =
            attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>()
                .eq("catelog_Id", catelogId));

        List<Long> collect = attrGroupEntityList.stream().map((item) -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());



        //2.2找到这些分组关联的属性
        List<AttrAttrgroupRelationEntity> groupId = relationDao.selectList(
            new QueryWrapper<AttrAttrgroupRelationEntity>()
                .in("attr_group_id", collect));

        List<Long> attrIds = groupId.stream().map((item) -> {
            return item.getAttrId();
        }).collect(Collectors.toList());
        //2.3从属性表里面剔除这些属性

        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>()
            .eq("catelog_id", catelogId)
            .eq("attr_type", ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());

        if(attrIds != null && attrIds.size() > 0) {
            queryWrapper.notIn("attr_id", attrIds);
        }

        String key = (String) params.get("key");

        if(!StringUtils.isEmpty(key)){
            queryWrapper.and((w)->{
                w.eq("attr_id",key).or().like("attr_name",key);
            });
        }

        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), queryWrapper);

        PageUtils pageUtils = new PageUtils(page);

        return pageUtils;
    }

}